Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit to a base station an indication of a UE capability associated with a beam change at the UE. The UE may receive, from the base station during a scheduling slot, a control signal including a transmission configuration indicator (TCI) and a grant for a transport block over a first slot aggregation including a set of slots. In some cases, each slot of the first slot aggregation is offset from the scheduling slot according to a scheduling constraint based on the indicated UE capability. The UE may transmit or receive the transport block over the first slot aggregation using a UE beam based on the TCI.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method for wireless communications at a user equipment (UE), comprising: transmitting to a base station an indication of a UE capability associated with a time threshold for a beam change at the UE; receiving from the base station a control signal comprising a transmission configuration indicator (TCI) and a grant for a transport block over a first slot aggregation comprising a plurality of slots, wherein receiving the control signal comprises receiving a plurality of repetitions of the control signal over a second slot aggregation occurring prior to the first slot aggregation, and wherein a scheduling slot for the control signal comprises a slot carrying a last repetition of the plurality of repetitions of the control signal; determining that an offset between the scheduling slot and a sequentially first slot of the first slot aggregation is smaller than the time threshold; refraining from performing a beam change for the plurality of slots of the first slot aggregation; and transmitting or receiving at least one instance of the transport block over at least one slot of the first slot aggregation using a UE beam, wherein the UE beam is selected based at least in part on the refraining.
2. The method of claim 1 , wherein the time threshold is based at least in part on the indicated UE capability.
3. The method of claim 2 , further comprising: receiving from the base station during a second scheduling slot a second control signal comprising a second transmission configuration indicator (TCI) and a second grant for a second transport block over the second slot aggregation comprising a second plurality of slots; determining that an offset between the second scheduling slot and a sequentially first slot of the second slot aggregation is larger than the time threshold; and performing the beam change based at least in part on the second TCI.
4. The method of claim 1 , further comprising: receiving a semi-static slot configuration, wherein a portion of the first slot aggregation conflicts with the semi-static slot configuration.
5. The method of claim 4 , further comprising: ignoring a portion of the first slot aggregation that conflicts with the semi-static slot configuration.
6. The method of claim 4 , wherein a sequentially first slot of the first slot aggregation is a first slot of a second portion of the first slot aggregation that does not conflict with the semi-static slot configuration.
7. The method of claim 1 , wherein the first slot aggregation includes a pair of slots.
8. The method of claim 7 , wherein the UE is configured to transmit or receive on the pair of slots using a same MCS and a same resource element allocation.
9. The method of claim 1 , wherein the first slot aggregation and second slot aggregation are part of a plurality of slot aggregations.
10. The method of claim 9 , wherein each of the plurality of slot aggregations comprises a pair of slots, and each slot aggregation is adjacent to two other slot aggregations.
11. The method of claim 9 , wherein the UE is configured to transmit or receive on the pair of slots using a same MCS and a same resource element allocation.
12. An apparatus for wireless communications at a user equipment (UE), comprising: a processor, memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: transmit to a base station an indication of a UE capability associated with a time threshold for a beam change at the UE; receive from the base station a control signal comprising a transmission configuration indicator (TCI) and a grant for a transport block over a first slot aggregation comprising a plurality of slots, wherein receiving the control signal comprises receiving a plurality of repetitions of the control signal over a second slot aggregation occurring prior to the first slot aggregation, and wherein a scheduling slot for the control signal comprises a slot carrying a last repetition of the plurality of repetitions of the control signal; determine that an offset between the scheduling slot and a sequentially first slot of the first slot aggregation is smaller than the time threshold; refrain from performing a beam change for the plurality of slots of the first slot aggregation; and transmit or receive at least one instance of the transport block over at least one slot of the first slot aggregation using a UE beam, wherein the UE beam is selected based at least in part on the refraining.
13. The apparatus of claim 12 , wherein the time threshold is based at least in part on the indicated UE capability.
14. The apparatus of claim 13 , wherein the instructions are further executable by the processor to cause the apparatus to: receive, from the base station, during a second scheduling slot a second control signal comprising a second transmission configuration indicator (TCI) and a second grant for a second transport block over the second slot aggregation comprising a second plurality of slots; perform the beam change based at least in part on the second TCI if the time threshold is less than an offset between the second scheduling slot and a sequentially first slot of the second slot aggregation.
15. An apparatus for wireless communications at a user equipment (UE), comprising: means for transmitting to a base station an indication of a UE capability associated with a time threshold for a beam change at the UE; means for receiving from the base station a control signal comprising a transmission configuration indicator (TCI) and a grant for a transport block over a first slot aggregation comprising a plurality of slots, wherein the means for receiving the control signal comprises means for receiving a plurality of repetitions of the control signal over a second slot aggregation occurring prior to the first slot aggregation, and wherein a scheduling slot for the control signal comprises a slot carrying a last repetition of the plurality of repetitions of the control signal; means for determining that an offset between the scheduling slot and a sequentially first slot of the first slot aggregation is smaller than the time threshold; means for refraining from performing a beam change for the plurality of slots of the first slot aggregation; and means for transmitting or receiving at least one instance of the transport block over at least one slot of the first slot aggregation using a UE beam, wherein the UE beam is selected based at least in part on the refraining.
16. The apparatus of claim 15 , wherein the time threshold is based at least in part on the indicated UE capability.
17. The apparatus of claim 16 , further comprising: means for receiving from the base station during a second scheduling slot a second control signal comprising a second transmission configuration indicator (TCI) and a second grant for a second transport block over the second slot aggregation comprising a second plurality of slots; means for determining that an offset between the second scheduling slot and a sequentially first slot of the second slot aggregation is larger than the time threshold; and means for performing the beam change based at least in part on the second TCI.
18. A non-transitory computer-readable medium storing code for wireless communications at a user equipment (UE), the code comprising instructions executable by a processor to: transmit to a base station an indication of a UE capability associated with a time threshold for a beam change at the UE; receive from the base station a control signal comprising a transmission configuration indicator (TCI) and a grant for a transport block over a first slot aggregation comprising a plurality of slots, wherein receiving the control signal comprises receiving a plurality of repetitions of the control signal over a second slot aggregation occurring prior to the first slot aggregation, and wherein a scheduling slot for the control signal comprises a slot carrying a last repetition of the plurality of repetitions of the control signal; determine that an offset between the scheduling slot and a sequentially first slot of the first slot aggregation is smaller than the time threshold; refrain from performing a beam change for the plurality of slots of the first slot aggregation; and transmit or receive at least one instance of the transport block over at least one slot of the first slot aggregation using a UE beam, wherein the UE beam is selected based at least in part on the refraining.
19. A method for wireless communications at a user equipment (UE), comprising: receiving a semi-static slot configuration; transmitting to a base station an indication of a UE capability associated with a time threshold for a beam change at the UE; receiving from the base station a control signal comprising a transmission configuration indicator (TCI) and a grant for transmission of a transport block over a sequentially second slot in a first slot aggregation of a pair of slots, the first slot aggregation including a sequentially first slot and the sequentially second slot, wherein the sequentially second slot conflicts with the semi-static slot configuration, wherein receiving the control signal comprises receiving a plurality of repetitions of the control signal over a second slot aggregation occurring prior to the first slot aggregation, and wherein a scheduling slot for the control signal comprises a slot carrying a last repetition of the plurality of repetitions of the control signal; determining that an offset between the scheduling slot and a sequentially first slot of the first slot aggregation is smaller than the time threshold; refraining from performing a beam change for the plurality of slots of the first slot aggregation; and transmitting or receiving at least one instance of the transport block over at least one slot of the first slot aggregation using a UE beam, wherein the UE beam is selected based at least in part on the refraining.
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May 15, 2019
May 10, 2022
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